Grinding-machine



(No Model.)

I'. A. SHOEMAKER.

GRINDING MACHINE.

No. 384,795. Patented June 19; 1888. 8

N. PllEns. Phummhagnpher, washington. D. C.

UNITED STATES l ATENT OFFICE.

FRANK A. SHOEMAKER, OF BUFFALO, NEV YORK.

Germaine-MACHINE.

SPECIFICATION forming part of Letters Patent No. 384,795, datedJune 19, 1888.

Application tiled November 15, 1886. Serial No. 218,86?. (Nomndel.) I

To @ZZ whom, t may concern: y

Be it known that I, FRANK A. SHOEMAKER, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Grinding-lvlachincs, of which the following is a specitication.

rIhis invention relates to a machine for grinding lathe-centers, pins, punches,rea1ners, and other similar parts which are required to be round and true.

My invention has particular reference to a machine of this kind in which the grindingwheel is mounted in a frame which can be adjusted to place the grinding-wheelin the proper position for grinding, and in which the grinding-wheel is rotated from a rotary part of the lathe. j

The object of my invention is to produce a simple and efficient machine of this kind which can be readily adj usted to the work and to the lathe on which it is used.

My invention consists o't the improvements which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation of myimproved grinding-machine attached to a lathe. Fig. 2is an end elevation thereof. Fig. 3 is a horizontal `section through the spindle ofthe grinding-wheel. Fig. 4 is a vertical section through the arm which carries the counter-shaft. Fig. 5 is a vertical section in line :v x, Fig. 4. Fig. 6 is a vertical section of the pivot of the horizontal frame and connecting parts.

Like letters of reference refer to like partsl in the several figures.

A isthe head-stock of thelathe; a, thelathe` spindle; a', the lathecenter formed on the same; B, the cone-pulley at the head of the lathe; b, the lathe-bed, and G the sliderest.

'All of these parts may be of any ordinary or arm e.

wheel is rotated. upon a horizontal arbor, j, which is secured to ithe upper portion of the sliding frame G. The

.supported on the arm e by means of a vertical pivot, f, formed centrally on the underside of theframe F and seated in the socket e' of the The frame Fis provided with parallel 6o horizontal guide bars or ways g, upon which is mounted a sliding frame, G, which carries the grinding-wheel H. Thelatter is provided with a hollow horizontal spindle, 7L, which Y forms at the same time a drum, around which l runs'the endless belt ,by which the grinding- The hollow spindle h turns latter is provided adjacent to the arbor with 7o a cone,j', and the arbor itself is provided with a conical head, jf, upon which cones the spindie h revolves by means ot" conical bearings. The arbor j is secured to the frame G by means of a screw-thread, which permits the adjust- 'ment of the cones when required to take up wear. XVhiIe I prefer this construction of the spindle on account of its simplicity and adjustability, any other suitable construction may be adopted.

K represents apost which extends upwardly from the socket d, and L represents a horizontal arm, which is attached to the postI Ki l by a split sleeve, l, so that the arm can be vertically adj usted on the post K upon loosening the screw Z of said sleeve.

m represents a horizontal counter -shai`t,` which is supported in the arm L.

N represents au arm extending upwardly from the arm L, and journaled at its lower 9o end in the arm L by` means of a horizontal sleeve, n, formed on one side of the arm N, and seated in a horizontal split socket, n', formed on the arm L, and provided with a screw, n2. The counter-shaft m is journaled in the arm N and sleeve n, and carries at the outer end of the latter a pulley, O, and at the outer side of the arm N a pulley, l?. The endless belt t' connects the pulley O with the drum h of the grinding-wheel.

IOO

' pulley Q is connected with the cone-pulley B ofthe lathe by an endless belt, r. The pulley Y Q is adj ustably secured to the driving-shaft q,

so that it can be adjusted toward and from the arm N, as may be necessary, to place the pulley over the cone B.

Thehorizontal frameFis adjusted on its pivot f to place the grinding-wheel in the proper position for grinding, and the frame is secured in this position bythe screw e2. Rotary motion is transmitted to the spindle ofthe grinding-pul ley from the cone-pulleyof the lathe by means of the connecting belts and pulleys. This means of rotating the grinding-wheel is very reliable and permits the wheel to be rotated much faster than the lathe-center by running the lathe in gear. The grinding-wheel is moved back and forth along the work by taking hold of a knob or handle, s, formed on the sliding frame G, and moving the latter on the ways g. By properly adjusting the slide-rest the frame F can be arranged with its grinding-wheel in front or in rear ofthe work, as may be most convenient for the operator. This enables the operator to grind objects which are clamped between the centers of the lathe. By swinging the arm N on the slecvenas a fulcrum the distance between the driving-shaftqand the lathecone B can be increased or reduced, as may be necessary, to properly tighten the drivingbelt r. This facilitates the adjustment of the grinding-machine to different lathes.

The drawings represent my machine as being used for grinding a lat-hecenter. When reamers, pins, punches, or other similar parts are required to be ground, they are clamped between the lathe centers.

I claim as my invention- 1. The combination, with the main frame, composed of a'socket, d, an arm, e, extending downwardly and inwardly from said socket d and provided at its inner end with a vertical socket, e', and a post, K, extending upwardly from the socket d and carrying a shaft, m, provided with a pulley, O, of a horizontal frame, F, provided with a vertical pivot, f, seated in the socket e', a grinding-wheel, H, provided'with a pulley, h, capable of free horizontal movement on the frame F, and an endless belt connecting the pulleys O and h, substantially as set forth.

2. The combination, with thegrinding-wheel andits supporting-frame D, provided with a post, K, of an arm, L, attached to said post, an arm, N, pivoted to the arm L, and a drving-shaft, q, journaled in the arm N, whereby the driving-shaft can be adjusted by swinging the arm N on its pivot, substantially as set forth.

3. The combination, with thegrinding-wheel and its supportingframe D, provided with a post, K, otan arm, L, secured to said post, a counter-shaft, m, and an arm, N, journaled concentrically in the arm L, a drivingshaft, q, journaled in the arm N, and pulleys and belts whereby the drivingshaft is connected with the counter-shaft and the latter with the grinding-wheel, substantially as set forth.

4. `The combination, with the supportingframe D, provided with a post, K, of a horizontal frame, F, connected with the frame D by a vertical pivot, a sliding frame, G, mounted on the frame F and carrying a grindingwheel, H, an arm, L, attached to the post K, a counter-shaft, m, and arm N, journaled in the arm L, and a driving-shaft, g, journaled in the arm N, substantially as set forth.

5. The combination, with the horizontal frame F and the sliding frame G, provided with a cone, j', of a horizontal adjustable arbor, j, secured to said frame and provided with a cone, jl, and a grinding-wheel, H, provided with a hollow spindle, h, mounted on said cones by conical bearings, substantially as set forth.

Vitness my hand this 5th day of November, 1886.

FR ANK A. SHOEM AKER.

Vitnesscs:

, CARL F. GEYER, JNO. J. BoNNER. 

